In order to make chenodeoxycholic acid or bear bile acid therapy has good curative effect to oxygen, before treatment to the patient to make proper selection is important.In theory, this two kinds of drugs is effective for cholesterol stone, so first to determine whether the patient of gallstones belongs to cholesterol stone.
      Although it is not a very reliable method can be used to determine the nature of the patient gallstone, but experience and clinical research, points out that simple gallbladder stone (not found in the bile duct stone), and these stones can through the X line, that is to say, in the gallbladder cannot see the shadow of gallstones on X-ray plain film, is very likely a cholesterol stone.Second, the drug dissolved stone effect is weak and slow, so the smaller the curative effect is better than the larger stones of curative effect, in the concrete when the choice, stone of the total should be less than 2 cm in diameter.Again, in order to ensure that drugs can enter the gallbladder and stone works, within the patient's gall bladder should have better function, on the oral gallbladder made films can clearly show the shadow of the gallbladder.
      In addition, the two drugs especially chenodeoxycholic acid has certain side effects, so it has a serious liver or kidney disease, pregnant women or young women, are not suitable for this kind of therapy.